| Idrija to Smyrna (Delaware) | 4,330.64 mi (6,969.49 km) |
| Idrija to Smyrna (Georgia) | 4,949.18 mi (7,964.94 km) |
| Idrija to Smyrna (Tennessee) | 4,930.81 mi (7,935.37 km) |
| Idrija to Snellville (Georgia) | 4,928.18 mi (7,931.14 km) |
| Idrija to Snoqualmie (Washington) | 5,445.56 mi (8,763.78 km) |
| Idrija to Snyder (Texas) | 5,653.00 mi (9,097.62 km) |
| Idrija to Socastee (South Carolina) | 4,724.85 mi (7,603.91 km) |
| Idrija to Socorro (Texas) | 5,904.98 mi (9,503.15 km) |
| Idrija to Soddy-Daisy (Tennessee) | 4,909.87 mi (7,901.67 km) |
| Idrija to Solana Beach (California) | 6,189.36 mi (9,960.81 km) |
| Idrija to Soledad (California) | 6,100.98 mi (9,818.58 km) |
| Idrija to Solon (Ohio) | 4,476.52 mi (7,204.27 km) |
| Idrija to Somers Point (New Jersey) | 4,287.66 mi (6,900.32 km) |
| Idrija to Somerset (Kentucky) | 4,800.61 mi (7,725.84 km) |
| Idrija to Somerset (New Jersey) | 4,232.66 mi (6,811.81 km) |
